5FJB

Cyclophilin A Stabilize HIV-1 Capsid through a Novel Non- canonical Binding Site


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 9 Å
  • Aggregation State: HELICAL ARRAY 
  • Reconstruction Method: HELICAL 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Cyclophilin a Stabilizes the HIV-1 Capsid Through a Novel Non-Canonical Binding Site.

Liu, C.Perilla, J.R.Ning, J.Lu, M.Hou, G.Ramalho, R.Himes, B.A.Zhao, G.Bedwell, G.J.Byeon, I.Ahn, J.Gronenborn, A.M.Prevelige, P.E.Rousso, I.Aiken, C.Polenova, T.Schulten, K.Zhang, P.

(2016) Nat.Commun. 7: 10714

  • DOI: 10.1038/ncomms10714

  • PubMed Abstract: 
  • The host cell factor cyclophilin A (CypA) interacts directly with the HIV-1 capsid and regulates viral infectivity. Although the crystal structure of CypA in complex with the N-terminal domain of the HIV-1 capsid protein (CA) has been known for nearl ...

    The host cell factor cyclophilin A (CypA) interacts directly with the HIV-1 capsid and regulates viral infectivity. Although the crystal structure of CypA in complex with the N-terminal domain of the HIV-1 capsid protein (CA) has been known for nearly two decades, how CypA interacts with the viral capsid and modulates HIV-1 infectivity remains unclear. We determined the cryoEM structure of CypA in complex with the assembled HIV-1 capsid at 8-Å resolution. The structure exhibits a distinct CypA-binding pattern in which CypA selectively bridges the two CA hexamers along the direction of highest curvature. EM-guided all-atom molecular dynamics simulations and solid-state NMR further reveal that the CypA-binding pattern is achieved by single-CypA molecules simultaneously interacting with two CA subunits, in different hexamers, through a previously uncharacterized non-canonical interface. These results provide new insights into how CypA stabilizes the HIV-1 capsid and is recruited to facilitate HIV-1 infection.


    Organizational Affiliation

    Department of Structural Biology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania 15260, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
GAG POLYPROTEIN
A, B
218Human immunodeficiency virus type 1 group M subtype BGene Names: gag
Find proteins for P04591 (Human immunodeficiency virus type 1 group M subtype B)
Go to UniProtKB:  P04591
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
PEPTIDYL-PROLYL CIS-TRANS ISOMERASE A
C
164Homo sapiensGene Names: PPIA (CYPA)
EC: 5.2.1.8
Find proteins for P62937 (Homo sapiens)
Go to Gene View: PPIA
Go to UniProtKB:  P62937
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 9 Å
  • Aggregation State: HELICAL ARRAY 
  • Reconstruction Method: HELICAL 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-03-16
    Type: Initial release
  • Version 1.1: 2017-08-23
    Type: Data collection